1. Manufacturing and shipping deadlines were violated. We agreed within about a week by DHL, I paid $75 USD for shipping, but it was sent in more than a month later using a cheap service for $8 USD.
2. I missed the number of boards I ordered, I paid for 10PCB and actually received 1 PCB.
3. The product qulity was cheap, some SMD part was soldered by hands.
This is my worst shopping experience in China. I strongly advise you not to contact this scammer.